Inserting a node into a path

Once you have created a path, you can add a node into the path.

The <0-255> number in the explicit-route-objects is used to order nodes, so you can insert a new node by using a number in between the numbers used by the two existing nodes. For example, if you have a node number 10 and a node number 20, then you can insert a node by using node number 15. To insert a node into a path complete the following steps.

For this example, a three node path named sf_to_sj was configured as follows.

vyatta@vm1# set protocols mpls-rsvp globals explicit-paths sf_to_sj explicit-route-objects 10 address 2.2.2.2
vyatta@vm1# set protocols mpls-rsvp globals explicit-paths sf_to_sj explicit-route-objects 20 address 4.4.4.4
vyatta@vm1# set protocols mpls-rsvp globals explicit-paths sf_to_sj explicit-route-objects 30 address 6.6.6.6

To modify the path named sf_to_sj to include a node between the first and second node, insert a new entry using a number between 10 and 20 for the explicit-route-objects parameter.
```
vyatta@vm1# set protocols mpls-rsvp globals explicit-paths sf_to_sj explicit-route-objects 15 address 3.3.3.3
```

Display the resulting four nodesf_to_sj path.

vyatta@vm1# show protocols mpls-rsvp globals explicit-paths 
 explicit-paths sf_to_sj {
        explicit-route-objects 10 {
                address 2.2.2.2
        }
        explicit-route-objects 15 {
                address 3.3.3.3
        }
        explicit-route-objects 20 {
                address 4.4.4.4
        }        }
        explicit-route-objects 30 {
                address 6.6.6.6
        }
 }

Note: When you modify a path, new make-before-break sessions are established using the new path. When successfully established, the new sessions using the new path replace the sessions that used the old path.

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Inserting a node into a path

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